It's hard to bet against this company right now.The group of $1 trillion market cap stocks is tiny, and pharmaceutical giant Eli Lilly (LLY -3.47%) isn't a member yet, though it is within striking distance at about $820 billion.However, the drugmaker's prospects look so strong that not only should it soon join the $1 trillion club, but it could even be a member of the more exclusive $2 trillion club by 2030. Here's why.The tirzepatide tailwindWhat's considered "solid" growth in revenue for a corporation? Th ...